<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
  <style>
    #l1{color: red}

    .c1{color: green}

    input[type='text'],body>p{background-color: yellow}

    body>div>div>p{color: pink}

    body div div p{background-color: blue}

    a:link{color: green}
    a:visited{color: red}
    a:hover{color: yellow}
    a:active{color: purple}

  </style>
</head>
<body>
<ul>
  <li id="l1">刘备</li>
  <li>关羽</li>
  <li class="c1">张飞</li>
</ul>
<p>香蕉</p>
<p class="c1">苹果</p>
<input type="text">
<input type="password">
<div>
  <p>P1</p>
  <div><p>p2</p></div>
  <div>
    <div><p>p3</p></div>
  </div>
</div>
<a href="http://www.qq.com">腾讯</a>
</body>
</html>